bareback vs raw dog

bareback

verb
  • To have sex without a condom. 

  • To anally penetrate without a condom. 

  • To have anal sex without a condom. 

noun
  • A bird, raised for meat, that lacks feathers, seen as an undesirable trait. 

adj
  • Without a condom. 

  • Without a saddle. 

adv
  • Without a condom. 

  • Without a saddle. 

raw dog

verb
  • To have sex without a condom; to bareback. 

  • To do an activity without protection or intermediary. 

adv
  • Without a condom; bareback. 

How often have the words bareback and raw dog occurred in a corpus of books? (source: Google Ngram Viewer )